CN211661253U - Spiral lifting automatic centering hydraulic pressing chuck for gear machining - Google Patents

Abstract

The utility model discloses an automatic centering hydraulic pressing chuck for gear processing screw lifting. A piston is installed in an inner cavity of a main plate body, a basic clamping claw is fixed on the end face of the main plate body, and the centering clamping claw is fixed on a basic plate. On the clamping jaw, the first spring and the second spring are installed in the hole of the piston facing the end face, the piston is connected with the pull rod, the pressure block is fixed on the rotating stud, the bottom end of the rotating stud is connected with the pull rod through the connecting block, and the pull rod drives the piston The workpiece is centered and clamped by the axial movement of the rotating stud, and at the same time, the rotating stud drives the pressing block to perform helical rotation to compress the workpiece. Through the above method, the utility model is used for the automatic centering hydraulic pressure clamping chuck of the gear processing screw lifting and lowering. The basic clamping jaw and the centering clamping jaw are controlled by the spring force to center the workpiece. It has a more reliable centering and clamping effect, avoids deformation during processing, and is suitable for the processing of gears with relatively thin wall thickness to ensure the processing accuracy.

Description

Self-centering hydraulic hold-down chuck for gear machining

technical field

The utility model relates to the technical field of gear processing, in particular to a self-centering hydraulic pressing chuck used for screw lifting and lowering of gear processing.

Background technique

Thin-walled parts have the characteristics of light weight, material saving and compact structure. They are used more and more in the automotive industry and aerospace industry, but they have poor rigidity and weak strength. The cutting force and cutting force generated during the turning process Heat can easily deform parts.

At present, three-jaw or four-jaw chucks are mainly used for clamping workpieces on lathes. In order to clamp the workpieces, the chuck needs to be given a suitable clamping force. For some workpieces with thicker walls, it is no problem to use this type of three-jaw or four-jaw chuck, but for some thinner gears, if three jaws are used to fix the workpiece, such as the jaws If the clamping force is too small, the workpiece rotates very fast, and the workpiece may fly out.

For the three-jaw chuck used in general machine tools, the clamping force is mainly adjusted by the oil cylinder, but the size of this clamping force cannot be reduced indefinitely, the clamping force is too small, and the surface of the processed workpiece will vibrate. The roughness will not meet the requirements of the drawing. At present, the thin-walled products we process are processed with a minimum clamping force of 0.5Mpa, and the inner hole of the product will still be deformed; if the clamping force is large, the workpiece will be deformed. The shape and position tolerances of the inner hole and end face of the workpiece cannot be guaranteed, and at the same time, the precision of the subsequent finishing processes such as gear grinding will not meet the final requirements.

Utility model content

The main technical problem to be solved by the utility model is to provide a self-centering hydraulic pressing chuck for gear machining spiral lifting, which can center the workpiece by controlling the basic clamping jaw and the centering clamping jaw by the spring force, and combine the pressing plate by rotating the stud. The helical rotation compresses the workpiece, which has more reliable centering and clamping effects, avoids product deformation during processing, and is suitable for gear processing with relatively thin wall thickness to ensure processing accuracy.

In order to solve the above-mentioned technical problems, a technical solution adopted by the present utility model is to provide a self-centering hydraulic pressing chuck for gear processing screw lifting and lowering, comprising: a main disc body, a piston, a basic gripper, and a centering gripper , tie rods, rotating studs and pressure blocks,

A piston is installed in the inner cavity of the main disc body, the basic clamping jaw is fixed on the end face of the main disc body, the centering clamping jaw is fixed on the basic clamping jaw by screws, and a first spring and a second spring are installed in the hole of the piston facing the end face, The piston is connected with the tie rod through the screw, the pressing block is fixed on the rotating stud through the screw, the rotating stud has a spiral groove, and the bottom end of the rotating stud is connected with the tie rod through the connecting block,

The tie rod drives the piston and the rotating stud to move axially to center and clamp the workpiece; at the same time, the rotating stud drives the pressure block to rotate spirally to compress the workpiece.

In a preferred embodiment of the present invention, there is a taper fit between the piston in the inner cavity of the main plate and the basic clamping jaw.

In a preferred embodiment of the present invention, the workpiece is placed at the position to be clamped on the basic clamping jaw and the centering clamping jaw, the workpiece is positioned by the positioning block and clamped by the clamping block, and the first spring is installed in the piston The workpiece is positioned in the hole of the cavity, and the second spring is installed on the outside of the first spring.

In a preferred embodiment of the present invention, the base jaw and the centering jaw are applied to the workpiece by the spring force of the first spring and the second spring.

In a preferred embodiment of the present invention, the rotating stud is provided with a fixed pin, and the rotating stud performs helical rotation under the action of the fixed pin.

In a preferred embodiment of the present utility model, when the tie rod moves downward, the piston moves downward together, and the basic clamping jaw and the centering jaw move radially to the inside of the center by the spring force at the same time to center and clamp the workpiece. ;

When the tie rod moves downward, the rotating stud also moves downward, and the rotating stud drives the pressing block to rotate together under the action of the fixed pin to compress the workpiece;

When the tie rod moves upward, the rotating stud will also move upward, and at the same time, the rotating stud rotates in a spiral. When the tie rod moves upward, the piston moves upward, and the basic jaw and the centering jaw move radially to the outside of the center. Release the workpiece, and the pressure plate exits.

The beneficial effects of the utility model are as follows: the utility model is used for the automatic centering hydraulic pressure clamping chuck of the gear processing screw lifting and lowering through the spring force to control the basic clamping jaw and the centering clamping jaw to center the workpiece, and the combined pressure plate is rotated by the rotating stud. The workpiece is pressed to ensure that the clamping force can be adjusted when machining gears with relatively thin walls, which has a more reliable centering and clamping effect, avoids product deformation during machining, and ensures machining accuracy.

Description of drawings

In order to illustrate the technical solutions in the embodiments of the present invention more clearly, the following briefly introduces the accompanying drawings used in the description of the embodiments. Obviously, the drawings in the following description are only some implementations of the present invention. For example, for those of ordinary skill in the art, under the premise of no creative work, other drawings can also be obtained from these drawings, wherein:

1 is a schematic structural diagram of a preferred embodiment of a self-centering hydraulic clamping chuck for gear processing screw lifting and lowering according to the present invention;

Fig. 2 is the side view of Fig. 1;

3 is a schematic structural diagram of a preferred embodiment of the present utility model for the gear processing screw lift automatic centering hydraulic pressure chuck clamping state;

The symbols of the components in the drawings are as follows: 1. Rotating stud, 2. Pull rod, 3. Piston, 4. Pressing block, 5. Positioning block, 6. First spring, 7. Clamping block, 8. Centering clamp Claw, 9, basic clamping jaw, 10, fixed pin, 11, second spring, 12, workpiece, 13, main body.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

Please refer to FIG. 1 to FIG. 3, the embodiments of the present utility model include:

An automatic centering hydraulic clamping chuck for gear processing screw lifting, including: a main body 13, a piston 3, a basic clamping jaw 9, a centering clamping jaw 8, a tie rod 2, a rotating stud 1 and a pressing block 4,

The piston 3 is installed in the inner cavity of the main disc body 13, the basic clamping jaw 9 is fixed on the end face of the main disc body 13, the centering clamping jaw 8 is fixed on the basic clamping jaw 9 by screws, and the piston in the inner cavity of the main disc body 13 is connected to the basic clamping jaw 9. There is a taper fit between the jaws 9 .

A first spring 6 and a second spring 11 are installed in the hole facing the end face of the piston 3 , the first spring 6 is installed in the hole in the inner cavity of the piston 3 to position the workpiece 12 , and the second spring 11 is installed on the outside of the first spring 6 , the centering jaw 8 is controlled by the spring force of the first spring 6 and the second spring 11 to center the workpiece 12 .

The piston 3 is connected with the tie rod 2 by screws, and the pressing block 4 is fixed on the rotating stud 1 by screws. The rotating stud 1 has a spiral groove, and the rotating stud 1 has a fixed pin 10. Under the action of 10, the screw rotates, and the bottom end of the rotating stud 1 is connected with the pull rod 2 through the connecting block.

The tie rod 2 drives the piston 3 and the rotating stud 1 to move axially to center and clamp the workpiece 12 ; at the same time, the rotating stud 1 drives the pressing block 4 to rotate spirally to compress the workpiece 12 .

When actually preparing for processing, the double centering spanning technology is used to center the workpiece on the position to be clamped by the basic jaw 9 and the centering jaw 8, the workpiece 12 is positioned by the positioning block 5 and clamped by the clamping block 7 , the basic jaw 9 and the centering jaw 8 are applied to the workpiece 12 by the spring force of the first spring 11 and the second spring 6 , and are positioned by the first spring 11 on the workpiece 12 at the same time.

The continuous axial movement of the tie rod 2 drives the rotating stud 1 to perform an axial lifting movement, and at the same time, the rotating stud 1 rotates with the pressure block under the action of the fixed pin 10, so that the pressure block 4 is positioned at the required tension. In the state, the workpiece 12 is compressed by rotating the stud 1 combined with the pressing block 4 .

The working process of the utility model for the automatic centering of the gear processing screw lifting automatic centering hydraulic pressing chuck is as follows:

When the tie rod 2 moves downward, the piston 3 moves downward together, and the basic jaws 9 and the centering jaws 8 move radially to the inside of the center at the same time by the spring force, centering and clamping the workpiece 12;

When the tie rod 2 moves downward, the rotating stud 1 also moves downward, and the rotating stud 1 drives the pressing block 4 to rotate together under the action of the fixed pin 10 to compress the workpiece 12;

When the tie rod 2 moves upward, the rotating stud 1 will also move upward, and at the same time, the rotating stud 1 does a helical rotation. When the tie rod 2 moves upward, the piston 3 moves upward along with it. The basic clamping jaw 9 and the centering clamping jaw 8 together. Moving radially to the outside of the center, the workpiece 12 is released, and the pressing plate 4 is withdrawn.

The beneficial effects of the utility model for the automatic centering hydraulic pressing chuck of the gear processing screw lift are as follows:

The basic clamping jaw and the centering jaw are controlled by the spring force to center the workpiece, and the workpiece is compressed by the helical rotation of the rotating stud combination pressure plate to ensure that the clamping force can be adjusted when machining gears with relatively thin walls. More reliable centering and clamping effect, avoid product deformation during processing, and ensure processing accuracy.

The above descriptions are only the embodiments of the present invention, and are not intended to limit the scope of the patent of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the description of the present invention, or directly or indirectly applied to other related technologies Fields are similarly included in the scope of patent protection of the present invention.

Claims (5)

1. The utility model provides a be used for gear machining spiral lift self-centering hydraulic pressure to compress tightly chuck which characterized in that includes: a main disc body, a piston, a basic clamping jaw, a centering clamping jaw, a pull rod, a rotary stud and a pressing block,

a piston is arranged in an inner cavity of the main disc body, the basic clamping jaw is fixed on the end surface of the main disc body, the centering clamping jaw is fixed on the basic clamping jaw through a screw, a first spring and a second spring are arranged in a hole of the piston facing the end surface, the piston is connected with the pull rod through a screw, the press block is fixed on the rotary stud through a screw, a spiral groove is arranged on the rotary stud, the bottom end of the rotary stud is connected with the pull rod through a connecting block,

the pull rod drives the piston and the rotary stud to axially move, and the workpiece is centered and clamped; meanwhile, the rotary stud drives the pressing block to rotate spirally to compress the workpiece.

2. The screw-lifting self-centering hydraulic pressure chuck for gear processing according to claim 1, wherein the piston of the main chuck body cavity is in a taper fit with the base jaw.

3. The spiral lifting self-centering hydraulic pressure clamping chuck for gear processing according to claim 1, wherein the workpiece is placed on the basic clamping jaw and the centering clamping jaw at a position to be clamped, the workpiece is positioned by the positioning block and clamped by the clamping block, the first spring is installed in the hole of the inner cavity of the piston to position the workpiece, and the second spring is installed on the outer side of the first spring.

4. The screw lift self-centering hydraulic press chuck for gear machining of claim 3, wherein the base jaw and the centering jaw are applied to the workpiece by spring forces of the first spring and the second spring.

5. The spiral lifting self-centering hydraulic pressure chuck for gear processing according to claim 1, wherein the rotary stud is provided with a fixing pin, and the rotary stud is spirally rotated by the fixing pin.

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